Coffee maker



FIG. 1 is a perspective view of a coffee maker showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a left side elevation view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines depict portion of the coffee maker that form no part of the claimed design. 

CLAIM The ornamental design for a coffee maker, as shown and described. 